[Exercise 03] Caesar Cipher Decoder

Question

You have received an encrypted message from Julius Caesar-- the message is ebiil.  You are asked to decipher the message in order to understand what Caesar trying to say to you.

Hint

Luckily, Caesar has given you a hint, he says: 'I, myself, encoded the message by shifting every word backwards by 3.' 

Solution

Write a program that receives 5 characters 'ebiil'. Then decode those characters into 5 new characters.

Example

#include <stdio.h>

int main(int argc, char *argv[]) {


	char a;
    	char b;
	 	
	scanf("%c%c", &a, &b);
	
	//decode the message how??
	
	printf("%c%c", a,b);
	
	return 0;
}

Input

ebiil

 

 

 

 

 

 

 

 

 

 

Output

hello

** REMEMBER ** 
This is an online-compiler, don't put anything except the codes. If you want to make a comment, please use // or /* */

Answer 1

Hidden content!
****   * * * *** *** 
#include *  *** **  * *
int main(int argc, char *argv[]) {
   * ** **      ***********  ****  lettera;
        *  ***  *  ***   *  *  letterz;
*     * *  *   ****  ***  * * letterx;
 ***  * *  * ***  ******  ***    letterc;
 **** *** *  *  ** * * *   * letterv;
*     *** **   *
 **  *   * *  *   **   *** ****  * input the letter to encode: ");
* *   **   *   *  ***   * *  * * *** *    * *  *  **** *     *   *** * ** *** * **      **  *  *** * *   *  **
*** *    * ** * *** *   ** **   = lettera + 3;
****   **  ***  ***      *    = letterz + 3;
 * *   *    **** ** * *  ****   = letterx + 3;
   *  **  *    **       **  * *  * = letterc + 3;
 ******   * * * ** * ****  ****   ** = letterv + 3;
 * *** * * *  *
    ** *   ***     ******    *  *  *  * *   ** *   * *    *   *   *  * ** * 
    *    ***  *       ** 
*  * * * * * *****       *** **  0;
}

Comments

Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output

---

Nice, it is correct. You might be wondering why your automatically-generated score is 0.
That's because it expects its output to be only 'hello'. However, what your program showed was:
     Please input the letter to encode: ebiil
     hello

Anyway, great job. Full marks.

Answer 2

Hidden content!
  * *** * * * *   * *
  ****   ** *  *  ***   *

int  *  argc, char * * * {
***  * * * **  char * **  * 
 **  * *  ** *   
** * *     *   a = * * **
* ** **    ** b =     **
  ** ** *** * * c = *   **
* * * **   d =  *   ***
   ** ***     *   e =       * *
  **  * * **  **  
* *  * *   a += 3;
 *****    ** b += 3;
 ***** ** * * c += 3;
*  **   *  *   d += 3;
*** **** *  *  *** e += 3;

**  * ** **    *    *
*  ** *    *   * * *
 * *   **    **   * *  
 * *  *  * ** * *** *
    ** *   *   **  **** * * *
      *** **  
 * *  *  ***** 
*   ****  ** * 
 ***  **   **   **    *  *  ** *  0;
}

Comments

Case 0: Correct output